Latch-lock



W. H. McFALL.

LATCH LOCK.

APPLICATION FILED JULY 31.1920,-

Patented Aug. 23, 1921.

UNITED STATES PATENT-- OFFICE...

WILLIAJVL H. MOFALL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNQR TO EDWARD REUKAUF AND WILLIAM H. MGFALL,

COPARTNEBS, TRADING UNDER THE FIRM STYLE cream aren. co., or PHILADELPHIA, PENNSYLVANIA. I a

i Lemon-Look.

' Fig. '2, *is: adet'ached perspective of theworking clements of my devlce Fig. 3, is a perspective of the. key cylinder; r 9

Fig. 4, is a vertical section taken on the line 4-4, Fig.1, and

Fig. 5, is a view in perspectlve of a section of an automobile door equipped w1th a latch handle made in accordance with my invention;

With reference to the drawings, the numeral 1 indicates the shank or body portion of the handle, to which may be attached a suitable hand lever or equivalent member 2. The shank'l is hollow, having a chamber '3 in the interior thereof in which is established, in the present instance, a revoluble' cylinder 4, and a second cylinder 5, the outer end of which lies flush with the end of the body portion 1,- said latter cylinder ,in the cylinder 5. Both the cylinders 4 and having therein a slot or way 5 for the receptlon of a key by means of which the saidcylinder 4 is revolved, In the present instance, the said cylinder 4 has a recess 6 at one side of the forward face thereof in which an eccentric portion of the end of the key 7 is adapted to lie when the latter is inserted in the slot formed for its reception 5 are loosely mounted in the chamber 3.

Seated in a recess 8-in the said body portion 1 at the rear end of the chamber 3, is a bolt member 9, said bolt member having in one side thereof a recess 10 adapted to receive one end ofa pin 11 which lies within the "chamber 3, the other en'd of thesaid pin occupyin a recess 12 formed in the rear face of t e cy1i'nder4.' Established in the said chamber 3 intermediate the said Cy]:

Application filed July 31,

. Specification of Letters Patent. Pathteii Aug. 23, 1921 1920. Serial No. 400,435.

. inder and the bolt member 8 is, in the present .instance, a plateor washer 13, said washer having an aperture 14 therein positioned preferably concentric withthe face of the cylinder 4, through which the .pin 11 passes,

' said aperture being only slightlylarger than the sectional area of the pin itself so as to provide a universal bearing therefor. In the'present instance, the pin 11 has at each end thereof a ball formation, said balls fitting respectively into the said recesses in the bolt member 9 and in, the cylinder 4.

It will now be clear that revolution of *the cylinder- 4 will carry the end of the *pin--11,- -which is attached thereto, in an arcuate path, and since the said pin is held stationary at the point where it passes through the aperture in the washer 13, the end of the pin which lies within the recess in the bolt member 8 is given a motion corresponding to that of the opposite end, this arcuate motion of the rear end of the pin causing a reciprocation in its recess of the said bolt member 9, the extent of the movement of the bolt depending upon the relative distances intervening between the pin bearing and .the cylinder 4 and the bolt member, respectively. Thus, if the washer is nearer .to the bolt member than to the said cylinder, it will be clear that the arc of the circle describedoby the end of the pin which lies within the recess in the boltrmemher will have a smaller radius than that described by the end of the pin lying within the'recess in the cylinder, the difference in the said radii being directly proportionate to the respective distances between the washer and the bolt and the cylinder, respectively. The recess in the said bolt 8 which is occupied by the pin 11 is made sufiiciently large to allow for the motion laterally of the bolt v of the end of the pin.

In the drawings, I have shown an embodiment of my invention in which the handle 1 is employed in connection with the well known form of snap latch employed on auto- In 'this instance, a keeper plate 15, with-- means for attaching the plate .to the door, is" provided, said door being indicated by the numeral 16, and a suitable cavity 17 is formed, in the present instance in the said &

In Fig. 1, thebolt is shown in the locked position, the pin 11 being shown in full lines in the position which it. assumes when the bolt is shot, the retracted position of the bolt and the corresponding position of the pin being shown in broken lines.

In the present instance, I provide a protrusion 18 extending into the chamber 3, as shown in Fig. 4, against which protrusion the pin 11 is adapted to strike when the bolt is in either the extreme retracted or advanced position, whereby the motion of the cylinder 4 is limited and the respective posi tions of the bolt indicated.

It is clear that the device may lend itself to numerous modifications with no departure from the essential features of the invention. Particularly is it possible by variation in the form of the cylinder and by other means to provide a distinct key for each lock, which is particularly desirable.

I claim:

1. In a lock, the combination ofa reciprocatory bolt member, a pin having one end operably connected with said bolt member, a universal bearing for said pin intermediate the ends, and means for moving the free end of said pin in an arcuate path.

2. In a lock, the combination of a revoluble element, a reciprocatory bolt member, means interconnecting said element and bolt member whereby revolution of the said ele-' ment effects reciprocation of said bolt member, and means for revolving said element.

3. In a lock, the combination of a revoluble cylinder, a reciprocatory bolt member, a universally mounted pin interconnecting said cylinder and bolt member whereby revolution of the cylinder effects reciprocaa. In a lock, the combination of a revoluble cylinder, a reciprocatory bolt member,

a pin having its ends connected respectively with said cylinder and bolt member, a universal bearing for said pin intermediate the said ends, and means for revolving said cylinder.

5. In a lock, the combination of a revoluble cylinder, a reciprocatory bolt member, recesses in the adjacent faces of said cylinder and bolt member, a pin pivoted universally intermediate the cylinder and the bolt member and having its ends respectively established within the said recesses, and means for revolving said cylinder.

6. In. a door lock, the combination of a latch for said door, an operating handle for said latch, said handle having a chamber in the interior thereof, a bolt slidable in said chamber and adapted to be moved into engagement with said door to prevent operation of said handle, a pin in said chamber having one end operably connected with said bolt, a. universal bearing forsaid pin intermediate the ends thereof, and key-actuated means for moving the free end of said pin in an arcuate path.

7. In a door lock, the combination of a latch for said door, an operating handle for said latch, said handle having a chamber in the interior thereof, a bolt slidable in said chamber and'adapted to be moved into en-" gagement with said door to hold the handle stationary, a revoluble cylinder in said chamber, a pin having the ends thereof operably connected respectively with the bolt and the cylinder, a universal bearing for the pin intermediate the said ends, and detachable means for revolving said cylinder.

WILLIAM H. MoFALL. 

